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Callan Bentley's Snapshots

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  1. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Flat Pebble Conglomerate, Gros Ventre Formation
    Image Owner: Robin Rohrback



    Description:

    This is 1 centimeter.



  2. Weathering rind

    Snapshot Title: Weathering rind
    Taken by: Callan Bentley

    Image: Flat Pebble Conglomerate, Gros Ventre Formation
    Image Owner: Robin Rohrback



    Description:

    This pebble (green) has a weathering rind (brown).



  3. Bedding

    Snapshot Title: Bedding
    Taken by: Callan Bentley

    Image: Flat Pebble Conglomerate, Gros Ventre Formation
    Image Owner: Robin Rohrback



    Description:

    This pebble contains pre-existing (i.e., pre-pebble-ification) layering.



  4. Grain boundaries

    Snapshot Title: Grain boundaries
    Taken by: Callan Bentley

    Image: Flat Pebble Conglomerate, Gros Ventre Formation
    Image Owner: Robin Rohrback



    Description:

    One grain (green) impinges on its neighbor (brown). P-sol!



  5. P-sol

    Snapshot Title: P-sol
    Taken by: Callan Bentley

    Image: Flat Pebble Conglomerate, Gros Ventre Formation
    Image Owner: Robin Rohrback



    Description:

    Another set of grain truncations that suggests strain accomplished via pressure solution.



  6. More truncated grain boundaries

    Snapshot Title: More truncated grain boundaries
    Taken by: Callan Bentley

    Image: Flat Pebble Conglomerate, Gros Ventre Formation
    Image Owner: Robin Rohrback



    Description:

    Evidence of pressure solution.



  7. Suture

    Snapshot Title: Suture
    Taken by: Callan Bentley

    Image: Flat Pebble Conglomerate, Gros Ventre Formation
    Image Owner: Robin Rohrback



    Description:

    Pressure solution!



  8. Piece of sandstone

    Snapshot Title: Piece of sandstone
    Taken by: Callan Bentley

    Image: Head of Wind River Canyon, Wyoming
    Image Owner: Callan Bentley



    Description:

    The Flathead Sandstone unconformably overlies the schist and granite of the Archean basement complex at this site. Explore the sandstone close-up in this macro GigaPan of a small sample from this site...



  9. Piece of sandstone

    Snapshot Title: Piece of sandstone
    Taken by: Callan Bentley

    Image: Great Unconformity, Wind River Canyon, Wyoming
    Image Owner: Callan Bentley



    Description:

    Explore the Flathead Sandstone close-up in this macro GigaPan of a small sample from this site: www.gigapan.com/gigapans/143007



  10. Piece of sandstone

    Snapshot Title: Piece of sandstone
    Taken by: Callan Bentley

    Image: Great Unconformity, Wind River Canyon, Wyoming
    Image Owner: Callan Bentley



    Description:

    Explore the Flathead Sandstone close-up in this macro GigaPan of a small sample from this site: www.gigapan.com/gigapans/143007



  11. Piece of granite

    Snapshot Title: Piece of granite
    Taken by: Callan Bentley

    Image: Great Unconformity, Wind River Canyon, Wyoming
    Image Owner: Callan Bentley



    Description:

    Explore a specimen of granite from this site in detail with this macro GigaPan: www.gigapan.com/gigapans/143006



  12. Piece of granite

    Snapshot Title: Piece of granite
    Taken by: Callan Bentley

    Image: Great Unconformity, Wind River Canyon, Wyoming
    Image Owner: Callan Bentley



    Description:

    Explore a specimen of granite from this site in detail with this macro GigaPan: www.gigapan.com/gigapans/143006



  13. Piece of granite

    Snapshot Title: Piece of granite
    Taken by: Callan Bentley

    Image: Head of Wind River Canyon, Wyoming
    Image Owner: Callan Bentley



    Description:

    Explore a sample of granite from this site in more detail in this macro GigaPan: www.gigapan.com/gigapans/143006



  14. Conchoidal fracture

    Snapshot Title: Conchoidal fracture
    Taken by: Callan Bentley

    Image: Granite, Wind River Canyon, Wyoming
    Image Owner: Callan Bentley



    Description:

    Showing this gray mineral to be quartz.



  15. Graphic

    Snapshot Title: Graphic
    Taken by: Callan Bentley

    Image: Granite, Wind River Canyon, Wyoming
    Image Owner: Callan Bentley



    Description:

    A little bit of "graphic granite" quartz / potassium feldspar intergrowth.



  16. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Granite, Wind River Canyon, Wyoming
    Image Owner: Callan Bentley



    Description:

    This is 1 centimeter.



  17. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Flathead Sandstone, Wind River Canyon, Wyoming
    Image Owner: Callan Bentley



    Description:

    This is 1 centimeter.



  18. Roundness

    Snapshot Title: Roundness
    Taken by: Callan Bentley

    Image: Flathead Sandstone, Wind River Canyon, Wyoming
    Image Owner: Callan Bentley



    Description:

    Check out how well-rounded these sand grains are - aeolian modification of the grains before eventual deposition in seawater?



  19. Halite casts

    Snapshot Title: Halite casts
    Taken by: Callan Bentley

    Image: Halite Casts
    Image Owner: Callan Bentley



    Description:

    These cubic shapes are casts of halite (salt) crystals that formed under hypersaline conditions on a Devonian tidal flat. Once buried anew by rising tides, the salt crystals dissolved, and mud filled ...



  20. Piece of schist

    Snapshot Title: Piece of schist
    Taken by: Callan Bentley

    Image: Head of Wind River Canyon, Wyoming
    Image Owner: Callan Bentley



    Description:

    To see a hand sample of schist from this site, check out this macro GigaPan:
    gigapan.com/gigapans/141715



  21. Piece of schist

    Snapshot Title: Piece of schist
    Taken by: Callan Bentley

    Image: Great Unconformity, Wind River Canyon, Wyoming
    Image Owner: Callan Bentley



    Description:

    To see a macro GigaPan of a sample of schist from this site, please check out this image: gigapan.com/gigapans/141715



  22. Vesicles

    Snapshot Title: Vesicles
    Taken by: Callan Bentley

    Image: Sand fom Þorlákshöfn, Iceland.
    Image Owner: Robin Rohrback



    Description:

    Signature of volcanic devolatilization.



  23. Shell fragment

    Snapshot Title: Shell fragment
    Taken by: Callan Bentley

    Image: Sand fom Þorlákshöfn, Iceland.
    Image Owner: Robin Rohrback



    Description:

    Rounded along the edges.



  24. Conchoidal fracture

    Snapshot Title: Conchoidal fracture
    Taken by: Callan Bentley

    Image: Sand fom Þorlákshöfn, Iceland.
    Image Owner: Robin Rohrback



    Description:

    On a small bit of obsidian.



  25. Hand sample

    Snapshot Title: Hand sample
    Taken by: Callan Bentley

    Image: Martinsburg Formation, South Page Valley Road, Page County, Virginia
    Image Owner: Callan Bentley



    Description:

    To see a graded bed from the Martinsburg Formation in cross-section, check out this macro GigaPan:
    gigapan.com/gigapans/141297



  26. Hand sample

    Snapshot Title: Hand sample
    Taken by: Callan Bentley

    Image: Martinsburg Formation, South Page Valley Road, Page County, Virginia
    Image Owner: Callan Bentley



    Description:

    To see a graded bed from the Martinsburg Formation in cross-section, check out this macro GigaPan:
    gigapan.com/gigapans/141297



  27. Cross-section

    Snapshot Title: Cross-section
    Taken by: Callan Bentley

    Image: Martinsburg Formation, South Page Valley Road, Page County, Virginia
    Image Owner: Callan Bentley



    Description:

    To see a graded bed from the Martinsburg Formation in cross-section, check out this macro GigaPan:
    gigapan.com/gigapans/141297



  28. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Martinsburg Formation, South Page Valley Road, Page County, Virginia
    Image Owner: Callan Bentley



    Description:

    This black bar is 10 cm in length.



  29. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Martinsburg Formation, South Page Valley Road, Page County, Virginia
    Image Owner: Callan Bentley



    Description:

    This black bar is 10 cm in length.



  30. Cross-section

    Snapshot Title: Cross-section
    Taken by: Callan Bentley

    Image: Martinsburg Formation, South Page Valley Road, Page County, Virginia
    Image Owner: Callan Bentley



    Description:

    To see a graded bed from the Martinsburg Formation in cross-section, check out this macro GigaPan:
    gigapan.com/gigapans/141297



  31. Cross-section

    Snapshot Title: Cross-section
    Taken by: Callan Bentley

    Image: Martinsburg Formation, South Page Valley Road, Page County, Virginia
    Image Owner: Callan Bentley



    Description:

    To see a graded bed from the Martinsburg Formation in cross-section, check out this macro GigaPan:
    gigapan.com/gigapans/141297



  32. Cross-section

    Snapshot Title: Cross-section
    Taken by: Callan Bentley

    Image: Martinsburg Formation, South Page Valley Road, Page County, Virginia
    Image Owner: Callan Bentley



    Description:

    To see a graded bed from the Martinsburg Formation in cross-section, check out this macro GigaPan:
    gigapan.com/gigapans/141297



  33. Cross-section

    Snapshot Title: Cross-section
    Taken by: Callan Bentley

    Image: Martinsburg Formation, South Page Valley Road, Page County, Virginia
    Image Owner: Callan Bentley



    Description:

    To see a graded bed from the Martinsburg Formation in cross-section, check out this macro GigaPan:
    gigapan.com/gigapans/141297



  34. Joint set

    Snapshot Title: Joint set
    Taken by: Callan Bentley

    Image: Martinsburg Formation, South Page Valley Road, Page County, Virginia
    Image Owner: Callan Bentley



    Description:

    A nice set of subparallel fractures.



  35. Tool marks?

    Snapshot Title: Tool marks?
    Taken by: Callan Bentley

    Image: Martinsburg Formation, South Page Valley Road, Page County, Virginia
    Image Owner: Callan Bentley



    Description:

    Little divots and grooves on the bottom of this bed.



  36. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Martinsburg Formation, South Page Valley Road, Page County, Virginia
    Image Owner: Callan Bentley



    Description:

    1 inch.



  37. Turbidite

    Snapshot Title: Turbidite
    Taken by: Callan Bentley

    Image: Martinsburg Formation, South Page Valley Road, Page County, Virginia
    Image Owner: Callan Bentley



    Description:

    Which way is up?
    Consider this hand-sample for a hint:
    gigapan.com/gigapans/141297



  38. Scale

    Snapshot Title: Scale
    Taken by: Callan Bentley

    Image: Martinsburg Formation, South Page Valley Road, Page County, Virginia
    Image Owner: Callan Bentley



    Description:

    Inches on top; centimeters on bottom.



  39. Turbidite

    Snapshot Title: Turbidite
    Taken by: Callan Bentley

    Image: Martinsburg Formation, South Page Valley Road, Page County, Virginia
    Image Owner: Callan Bentley



    Description:

    Which way is up?
    Consider this hand sample for a hint:
    gigapan.com/gigapans/141297



  40. Turbidite

    Snapshot Title: Turbidite
    Taken by: Callan Bentley

    Image: Martinsburg Formation, South Page Valley Road, Page County, Virginia
    Image Owner: Callan Bentley



    Description:

    Which way is up (hint = more clay in the well-cleaved stratum)?
    Here's a hand-sample to consider: gigapan.com/gigapans/141297



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